The New Encyclopaedia Britannica, Volume 24Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 230
... source will be spherical ; otherwise , as is the case with many crystals , the envelope will be ellipsoidal in shape ( see refraction , double ) . An extended light source will consist of an infinite number of point sources and may be ...
... source will be spherical ; otherwise , as is the case with many crystals , the envelope will be ellipsoidal in shape ( see refraction , double ) . An extended light source will consist of an infinite number of point sources and may be ...
Page 273
sources : the Qur'an and the sunnah , revealed writing and the prophetic tradition . He is also the source of the Wahhābīyah , mid - 18th - cen- tury traditionalist movement of Islām . Abstract of text biography . Ibn Taymiyah had a ...
sources : the Qur'an and the sunnah , revealed writing and the prophetic tradition . He is also the source of the Wahhābīyah , mid - 18th - cen- tury traditionalist movement of Islām . Abstract of text biography . Ibn Taymiyah had a ...
Page 379
... source . The waves are then reflected back to the source . The strength of the stand- ing wave pattern set up between the source and the reflector as the distance between source and reflector is varied , or as the fre- quency is varied ...
... source . The waves are then reflected back to the source . The strength of the stand- ing wave pattern set up between the source and the reflector as the distance between source and reflector is varied , or as the fre- quency is varied ...
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